1University of Illinois, Department of Electrical and Computer Engineering and Microelectronics Laboratory, Urbana, USA
2Hewlett-Packard, Optoelectronics Division, San Jose, USA
The first current injection lasing action in AlGaInP/Ga0.65In0.35P heterostructures grown on commercially available GaAs0.6P0.4 substrates is reported. At 77 K, laser diodes exhibited threshold current densities of 900 A/cm2 with yellow stimulated emission near 5735 Å. This is the shortest current injection lasing wavelength ever achieved in a III-V compound semiconductor.
If we search through scientific journals/articles, it would probably be the case that all sorts of wavelengths have been undertaken in a lab.
That's not the point of this thread. Critical here, is the fact that there must be some evidenced effort/intention/undertaking to actually create a diode. I won't say that there has to be a view to commercialization, because that's a touchy way to phrase it. But there has to be some evidence of a stated intention to actually release the diode as a tangible product.